Brooks : The Fruit Spot of apples 439 



Mixture Time of spraying Percentage of picked 



apples spotted 



None 



33.S 



Bordeaux June 17, June 24, and July 9 1.1 



" June 25 and July 9 1.5 



u July 9 and July 27 1-7 



u July 27 20.4 



Lime June 25 and July 9 16.7 



Resin lime June 25 and July 9 12.9 



Calcium phosphate June 25 and July 9 23.4 



The disease was not so serious as the preceding season, but 

 the results were just as marked. While the lime was beneficial 

 and the resin lime even more effective, it can be seen that both 

 were far inferior to Bordeaux. The calcium phosphate was as evi- 

 dent on the foliage and fruit at the close of the season as the Bor- 

 deaux, but it seemed to have had but little effect upon the disease. 

 If it had any effect upon the skin of the apple it could not be 

 detected. A study of the results obtained from the use of Bor- 

 deaux shows that the application made on July 9 was more effec- 

 tive than any other. It also indicates that applications made as 

 'ate as July 27 may materially reduce the disease. These facts 

 will be of special interest when viewed in connection with the re- 

 sults obtained in orchard inoculation experiments. 



Inoculations. — Throughout the summer a large stock of liquid 



nask-cultures was kept on hand. The spores from these were 



a ded to water or to a one per cent, sugar solution and applied 



the trees by means of a bucket-pump spraying outfit. The cul- 



ures used were approximately of the same age and the number of 



em added to a given quantity of water was always the same. The 



prayings were all made between four and six o'clock in the after- 



no °n. At each time two trees were thoroughly treated with water 



containing spores and two others with the sugar solution. These 



rees Were given a second spraying two or three days later. The 



ex week other trees were treated in the same manner. All of 



were Baldwins. It was not considered necessary to spray 



the trees 



e check trees with sterile water as the applications made to the 



er tre es did not amount to more than an ordinary dew, and 



were common during the time of making the experiments. 



with ^^ Secured sn owed no contrast between the trees sprayed 



w ater and those treated with the sugar solution. The results 



